How well would it work at "using" the excess heat of the CPU Jow Forums?

But that piston is moving that wheel doesn't it? So the heat has been "converted" to kinetic energy

It uses the heat flow.
You know what cools better? Not putting shit in the path of the flow.

Then instead of a wheel, we could put a fan instead, so it'd use the excess heat to move the fan which would actually help with airflow. Or other complex mechanism, the more things that excess heat can be "wasted" on, the better

>not converting this back into electricity to mine bitcoin

Could power few gaymen leds.

There is no instance where such a fan would be an electrically powered one.
CPUs use more power the hotter they get, so to cap one with a Stirling engine to power a fan would cost more energy due to CPU inefficiency than to tap for an electric fan.

Is there even any practical way to convert thermal energy without boiling water and turbines?

But the fan I was referring to is not there to cool the CPU like all regular heatsinks, but rather a way to waste the excess of heat. In fact, It could be any mechanical device that requires "energy", since what with Stirling engine we're converting heat to kinetic, for "cooling a CPU" the inneficiency of the system this time is a good thing, the more heat/energy wasted whilst being transformed into kinetic the better.

That's what the sterling engine does (pictured in OP)- it just needs a temperature difference between the top and bottom plates. It's somewhat practical.

Thermocouples

>delaying entropy
>cooling

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Make the top part a heatsink, then replace the spokes of the flywheel with fanblades to circulate air over the fins.

the system will reach an equilibrium where the top is cooler than a regular heatsink... but the cpu side will be hotter than a regular heatsink
all you end up doing is shifting heat away from the outside and towards the cpu side, exactly the opposite of what you want to be doing

>How well would it work at "using" the excess heat of the CPU Jow Forums?

It wouldn't work at all.
Look, let's say the CPU heats another medium at safe temps (for example water), that mediums temperature would still be too low to use it for about anything.

Below 100°C is imo useless, can't even get the water to boil so you can boil some eggs or whatever.

Steam turbines in the power plant I worked had 400°C 40bar the lowest was around 250 5bar I think.

In the end I think the only way to use it is to help heat the room in the winter, which it can by default (at least a little.

But what about a method of "wasting" the excess heat, so as a replacement of a traditional heatsink but without the need of a fan.

Learn some thermodynamics 101 first, and then start blabbing.

Since Stirling engines convert heat into kinetic, wouldn't the innefficiency of the engine actually a good thing, literally "wasting" all that heat whilst trying to move a wheel, a clock or trying to power a LED.
Literally using the first law of thermodynamics

>But what about a method of "wasting" the excess heat, so as a replacement of a traditional heatsink but without the need of a fan.

You need to understand that there are times where you don't want heat at all like in summer.
Where do you get something that is cooler than the CPU to "waste" the heat on when it's 40°C outside?

The idea is stupid no matter how you look at it, the 5% of energy you might be able to save this way is negligible, better way is just to get CPUs to use less energy which results in less heat in the first place.

>what about a method of "wasting" the excess heat, so as a replacement of a traditional heatsink but without the need of a fan.
what are you trying to say?
you want to convert excess heat into something which isn't heat, to reduce the amount of heat?
in a closed system, this doesn't make sense, you're putting energy into a box in the form of electricity, so the same amount of energy must leave the box eventually
you cannot consume energy, only move it around

tweaktown.com/news/9051/msi_employs_stirling_engine_theory/index.html

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>the more heat/energy wasted whilst being transformed into kinetic the better.
No, because that means that it remains as heat. The ideal would be a 100% efficienty in converting to kinetic (which in case you hven't noticed, can't happen), and you don't understand what you're saying. Consider KYSing yourself man.

>you want to convert excess heat into something which isn't heat, to reduce the amount of heat?
Yes since Stirling Engines literally convert heat into kinetic energy, which could either be reused to power the fan for the heatsink like the MSI concept from 2008 Or just adding more things for it to power like a mechanical clock, LED, thus "wasting" the heat.

See:

Where can I buy one of these to put on X570?

ok, cool! you've converted a minuscule amount of heat into kinetic energy
the fan has finished accelerating, and it moving along as a steady rate, requiring very little energy to keep it spinning, and comparatively losing very little energy to friction (the motion turns back into heat, go figure)
you know what you've done? created a spinning capacitor, it holds a little bit of energy in it's motion, but that's it, i couldn't even tell you if the energy it stores exceeds that of the capacity of the air that could have been in that space instead

you could use a peltier element instead, it sits in between the cpu and the heatsink and powers the heatsinks fan

something like this, but rewire the peltier to the fan instead
legitreviews.com/v3-components-voltair-tec-cpu-cooler-review_142088/2

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buy an MSI board from 2008 and transplant it
the southbridge hole spacing might be the same and it could be a drop in replacement

plenty of people have had this idea, and it's a dumb idea

You're not "wasting" energy, the piston will only work until the entire cylinder reaches a similar temperature. You're basically piggybacking on the temperature difference and heat flow, not actually converting thermal to kinetic energy. If the top plate were to be a heatsink and the shaft drove a propeller, it would be "self managed" and more efficient, but there's absolutely no practical implementation that could avoid the CPU throttling itself. You wouldn't want it less efficient, because then it'd just be a bad heat accumulator (not sink), so you might as well just put a solid metal cube over the CPU and achieve better results.

elaborate

well for starters, peltier units are really inefficient, so you'd need a pretty big temperature difference to power a cpu fan, which means the cpu will need to be much hotter than ambient, which is obviously bad
and the peltier acts as an insulator (compared to a heatsink), so that might actually happen
at best you'll have an operating fan with a nice, cool heatsink... and a smokin' hot cpu

holy crap the video on this is cheesy
youtu.be/OqqeR4ZRx6w

well, that's more "at worst"
at best it doesn't insulate much, heat goes right though, meaning little temperature difference, meaning little electricity being made, and the fans won't spin, so it's like a crappier passive cooler

well look at the cooler i linked, it has the peltier ontop of the cpu hotplate and its own finstack, it might work

This.

Why wouldn't the general temperature lower though, with a sufficiently efficient top side? It could work if we can use up enough of the heat that it would be lower than what the equilibrium would have been with a regular heat sink.

It's not about how much energy it takes to move the wheel, rather how much of it escapes still as heat energy.

A heat engine obstructs dissipation of heat

If you want to accelerate it you need a heat pump, not engine.
Heat pumps are either
>Peltier
>Refrigirator
>Backdriven Karno engine or some orher engines

Heat pumps take additional energy from outside to move the heat faster.

Well, if this repo gets 10k stars, I will publish the source.

give the faggot likes

github.com/deepnude/deepnude

>You're basically piggybacking on the temperature difference and heat flow, not actually converting thermal to kinetic energy.

That means a serling engine violates the law of conservation of energy.

The heat flow (flux) depends on the insulation and the surface area.
If you want to achieve the same heat flux while adding insulating power scavengers, you would need to increase the surface area over which the insulators are attached.
The downside here is that the heat flux through an individual power scavenger will be less so you will end up with many units operating at lower efficiency.

OP would probably be better off getting some passive units like heat pipes to transfer the heat to a large external fanless heat sync and call it a win by saving energy by not using a fan.

It actually works: youtu.be/mazFW1OvMog?t=559
But it uses lots of power so it's not worth it for daily use.
You can make one yourself buying one of those peltier plates:
youtu.be/dTTq_vYvWIY

im not talking about using a peltier and POWERING IT to cool the chip, im talking about using the peltier to power the fans on a tower cooler via the thermal difference of the ambient and the cpu

externally powering a peltiar obviously works.. if the aim is to spend a bunch more electricity to get the cpu below ambient
if you don't need the cpu below ambient (you don't), then it's a waste of electricity

It will reach an equilibrium with more heat being trapped in the lower half than the upper half, making for a poor/worse solution if you aren't removing more heat from the bottom half than what the temperature would be across the whole heat-sink without the Peltier plate.

Technically possible: youtube.com/watch?v=6LmDAFBBPK8
MSI actually made a prototype back then

im a dustbin wearing sunglasses

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accurate

It has already been done.